Traffic-adaptive packet relaying in VANET

Authors:
Mahmoud Abuelela;Stephan Olariu
Affiliations:
Old Dominion University, Norfolk, VA;Old Dominion University, Norfolk, VA
Venue:
Proceedings of the fourth ACM international workshop on Vehicular ad hoc networks
Year:
2007

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Abstract

It was recently noticed that co-directional roadways traffic consists of a collection of disconnected clusters, implying that end-to-end connectivity between sender and receiver is not guaranteed to exist. Because of this lack of connectivity, a car that stores a packet may have to carry it for a while, acting as a "data mule", before a suitable next hop can be identified. We offer an analytical expression for the expected size of a cluster in co-directional traffic, confirming the findings of [2, 3, 4]. Next, we develop TAPR -- a Traffic-Adaptive Packet Relaying protocol wherecars use a simple strategy to decide whether to route through co-directional or oncoming clusters. TAPR is evaluated through extensive simulation.